Guess I missed this post earlier. The reason why I like the harem endings is that I am a completionist and at the same time usually too lazy to replay every game multiple times, so harem endings give me an option to see most of the content in a single replay.
But yeah, harem ending would probably be a bit insane to attempt to make, especially with the number of possible partners in this game. I would really like an option of a threesome if possible though, especially with Rin (fuck train anyone?
), though even that might be quite the undertaking due to all the possible combinations. Perhaps the best solution would be to limit the possible threesomes to only a few pre set combinations?
As for animations, I must say I never was a fan of them. I prefer well made static images/renders over them any day, especially since most such animations just seem awkward and anything but erotic to me...